Carburetor



E. F. UTZ.

CARBURETO.

APPucATloN FILED MAR.6,`191B. 1,416,913.

ATTOR N EY Ufz,

Patented May 23, 1922.y

Ely-m@ WITNESSES I PATENT OFFICEe EUGENE F. UTZ, 0F MIDDLETOWN, OHIO.

CARBURETOR.

Application filed March 6, 1918.

To aZZ whom t may concern.'

Be it known that I, EUGENE F. U'rz, a citizen of 'the United States, residing at Middletown, in the county of Butler and State of Ohio, have invented certain new and useful Improvements in Carburetors, of which the following is a specication.

The broad idea of the present invention is to enrich the mixture flowing from` a carburetor in proportion as the temperature of the water in a cooling jacket of an internal combustion engine falls.

This is carried out by jacketing a thermal bar so that it will expand and contract with the rise and fall of the temperature of the water, and providing almost any ordinary type of carburetor with an auxiliary gasoline nozzle whose opening and closing movements are controlled by the action of said thermal bar.

Details of my preferred manner of carrying out the invent-ion are set forth below, and shown in the drawings, wherein Figure 1 is a general vertical section of this entire device, showing the thermal element diagrammatically only.

Figure 2 is a sectional detail to be referred to hereinafter.

In the type of carburetor shown herewith, gasoline enters at 1 into a float chamber 2 and raises and lowers the iioat 3 which in turn controls a needle valve 4: to shut off the admission of gasoline when enough or too much has been supplied. From the float chamber the gasoline iiows along a passage 5 to and through the main nozzle 6 whose opening is controlled as usual at 7. A ir is admitted at 8, and sometimes through the air valve 9 which is controlled as at 10. The numeral 11 designates the butteriiy valve, and 12 is the outlet to the intake manifold of the engine, not shown. Thus is briefly described the construction of any well known type of carburetor, and as far as this element is concerned, my present invention consists in the provision of an auxiliary nozzle 15 opening from the passage 5 and controlled by a vertically movable needle valve 16 normally rised by a spring 17. Therefore, when whatever opposes this spring is removed or the pressure thereon released, the spring will cause the ope-ning of the valve so that the nozzle 15 admits gasoline in addition tol that admitted by the main nozzle 6, with the result that the mix- Specication of Letters Patent.

Patented May 23, 1922.

Serial No. 220,777.

ture is enriched where it flows at 12 to the engine.

In Figure 1 I have diagrammatically shown 'a thermal element which is employed 1n connection with this invention. The same might be said to consist of a bar 2O of hard rubber or the like disposed between water legs 21 and 22 which are respectively connected as at 23 and 24 to the water cooling system of an internal combustion engine. Whatever the arrangement, when the temperature of the water in this system rises, the thermal bar 20 expands for purposes yet to appear. One end of this bar is iixed, and the other carries a hook 25 bearing against one arm of a bell-crank lever 26 pivoted at its angle at 27 to some fixed support, and the other arm of this bell-crank lever has a hole 28 loosely engaging a set screw 29 mounted in the. upper end of t-he needle valve 16 as best seen in Figure 2.

With this construction, when the car is running or the temperature of the water is normal, the thermal bar 20 has expanded suficiently to let the valve 16 descend and close the auxiliary nozzle 15. Now when t-he weather grows cold or the engine becomes idle or perhaps gets quite cold by standing over night, the water legs 21 and 22 become cool or cold and the thermal bar 20 contracts. The result is that its hook 25v allows the bell-crank lever to turn on its pivot under the iniiuence of spring 17 and the arm 28 thereof raises the valve 16 so as to open the auxiliary nozzle 15 and permit a little more gasoline to flow into the mixing chamber than canv pass through the main nozzle 6. Therefore the cold engine will be supplied with a richer mixture for rtmning or for starting, and the supply is automatically controlled whatever the change in temperature. Manifestly the invention is susceptible of considerable change in the matter of details of construction,` and obviously it could be applied to many types of carburetors and the auxiliary nozzle could b e actuated by many forms of thermal elements, so long as the latter are actuated by variations in the temperature of the water or other cooling agent.

What is claimed as new is In combination with a carburetor, a main gasoline nozzle, an auxiliary gasoline nozzle vertically extending through the air chamber from a horizontal conduit from the bottom of a float chamber, said conduit supplying both said nozzles, a needle valve for closing the auxiliary nozzle, said needle valve including a stem having an interiorly threaded socket in its upper end, a set-screw adjustable in said socket, a spring for normally holding the needle valve in open position, a bell crank lever pivotally connected to the carburetor with one arm vertical and one arm horizontal and having an elongated opening in its horizontal arm through which the set screw passes, a horizontal thermal bar fixed at one end and having its other end engaged With the vertical arm of. the bellcrank lever, and Water legs on opposite sides of said thermal bar and in circuit with the cooling system of an internal Combustion engine, said float chamber of substantially the height between said horizontal conduit and the top of said auxiliary nozzle stein and unitary with the housing for the said elements and provided on its top With a seat to receive said thermal har.

In testimony whereof I affix my signature in presence of two Witnesses.

EUGENE F. UTZ. Witnesses LoYD BALL,- KARL A.. SATTLER. 

